Apparatus for grinding the edges of glass sheets



w. OWEN 1,966,869 APPARATUS FOR GRINDING THE vmews OF GLASS SHEETS July1 7, 1934.

Filed Nov. 23. 1933 H1 mm mm w N H m w 4 r v w 6 A w Q NH mmwa H...@mmmawuw. a u o w R k m NH m 5 W. OWEN July 17, 1934.

APPARATUS FOR GRINDING THE EDGES OF GLASS SHEETS 2 Sheets-Sheet 2 FiledNov. 23, 1933 \W II \N. JNH

INVENTOR lower end to the plate 26, while the rod 29 is provided at itsupper end with a knobbed handle 32, adapted to fit into a curved recessin the plate 28. A slot 33 extends from the curved recess to the end ofthe plate, permitting the ready application and release of the clampingdevice.

In operation, the rotation of the screw 6 from the motor 9 causes thebeam 3 and grinding de vices carried thereby to move down past the endsof the Windshields so that the grooved grinding wheels act thereon andround them, as indicated in Fig. 3, the grinding wheels finally arrivingat a position below the table which carries the windshields. Themovement of the parts is preferably stopped at this point by automati'cmeans. Such automatic means preferably includes a rod 34 slidablymounted in brackets 35, '35 "carried by one of the beams l, and providedwith a pair of adjustable stops 36, 36. The ends of the rod 34 areadapted to operate a pair of limit switches 3'7, 3'7 whose operatingarms are in the line of movement of the ends of the rod. When thedownward grinding movement of the apparatus is completed, a stop member38, carried by the arm 4, engages the lower stop member 36 moving therod down and opening the limit switch 37. The opening of this switchcuts off the supply of current to the motor 9 and also to the motors 17which rotate the grinding wheels. The table 23 is now shifted so as tobring another set of Windshields into position for grinding, and onstarting the motors 9 and 17 by means of a suitable push buttonarrangement, the motors are reversed, and the beam 3 moved upward sothat the new set of Windshields is edged on the upward movement of thegrinding wheels. This arrangement for grinding on both the down and upmovement of the grinding wheels in connection with the use of the tablehaving the two seats for handling two sets of Windshields, reduces thetime lost in operating the machine and increases its capacitymaterially.

Provision is made for adjusting the cross heads carrying the arms 13, 13toward and from each other to take care of work of different size by theuse of a pair of adjusting screws 39 which are threaded through nutscarried by the cross heads and are suitably swiveled against endwisemovement in the beam 3. Each of these screws is provided with anoperating wheel 40, over which passes a sprocket chain 41, by means ofwhich the operator can adjust the cross heads toward and from eachother. When the apparatus is used for edging the sheets lengthwisethereof, the arms 13, 13 are adjusted to the position shown in machineA, and the Windshields 19 are supported in the position shown upon atable "42 similar to the table 23 except in the matter of height. Inthis case, one of the templets 43 is curved in order to cause thegrinding wheel to follow the proper path to edge the curved sides of thewindshields. The operation in this case is the same as that heretoforedescribed, machine A being employed for edging the long sides of thewindshield, and machine B being employed for edging the shortsides. 1

What I claim is:

1. In combination in apparatus for edging glass plates, an upright guideframe, a beam mounted for vertical movement in the frame, a pair ofcross heads carried by the beam and adjustable therealong, a pair ofdepending arms pivoted to the cross heads at their upper ends, a groovedgrinding wheel and'driving motor therefor carried by the lower end ofeach arm, means for yieldingly pulling the two arms toward each other, atable located between the arms, means for supporting a glass plate to beedged in a vertical position upon the table, a pair of templets carriedby the table, means movable vertically with each of the grinding wheelsfor engaging one of the templets, and means for raising and loweringsaid beam.

2.. In combination in apparatus for edging glass plates, an uprightguide frame, a beam mounted for vertical movement'in the frame, a pairof cross heads carried by the beam and adjustable therealong, a pair ofdepending arms pivoted to the cross heads at their upper ends, amultiple grooved grinding wheel and driving motor therefor carried bythe lower end of each arm,

-means for yieldingly pulling the two arms toward each other, a tablelocated between the arms, means forsupporting a plurality of glassplates to be edged in vertical positions upon the table, a pair oftemplets carried by the table, means movable vertically with each of thegrinding wheels for engaging the templets, and means for raising andlowering said beam.

3. In combination in apparatus for edging glass plates, an upright guideframe, a beam mounted for vertical movement in the frame, a pair ofcross heads carried by the beam and adjustable therealong, a pair ofdepending arms pivoted to the cross heads at their upper ends, amultiple grooved grinding wheeland driving motor therefor carried by thelower end of each arm, means for yieldingly pulling the two arms towardeach other, a track at the lower end of the guide frame extendingtransversely of said beam, 8. table mounted for movement along the trackand provided with two spaced supporting seats, means for clamping aplurality of glass plates to be edged in a vertical position on each ofsaid seats, a pair of templets carried by said table on the oppositesides of each of said seats, guide means movable vertically with each ofsaid grinding wheels for engaging the templets when one of said seats ispositioned midway between the arms, and means for raising and loweringsaid beam.

4. In combination in apparatus for edging glass plates, an upright guideframe, a beam mounted for vertical movement in the frame, a pair ofcross heads carried by the beam and adjustable therealong, a pair ofdepending arms pivoted to the cross heads at their upper ends, amultiple grooved grinding wheel and driving motor therefor carried bythe lower end of each arm, means for yieldingly pulling the two armstoward each other, a table located between the arms, means forsupporting a plurality of glass plates to be edged in vertical positionsupon the table, a pair of templets carried by the table, means movablevertically with each of the grinding wheels for engaging the templets, avertical threaded shaft for raising and lowering said beam, and a motorfor driving said shaft.

5 1 I 1 I WILLIAM OWEN.

